Mastering Windows PowerShell Scripting - Third Edition

About ValueFromPipeline

ValueFromPipeline allows the entire object to be passed into a parameter from an input pipeline. The following function implements an InputObject parameter, which accepts pipeline input by using the ValueFromPipeline property of the Parameter attribute:

function Get-InputObject {    [CmdletBinding()]    param (        [Parameter(Mandatory, ValueFromPipeline)]        $InputObject    )    process {        'Input object was of type {0}' -f $InputObject.GetType().FullName    }}

Remember that values read from an input pipeline are only available in the process block of a script or function. As the default type assigned to a parameter is Object, this will accept any kind of input that might be passed. This behaves in a similar manner to the InputObject parameter ...